06-04-2018, 08:34 AM
My boat has just over 4100 hours on the original 1986 Crusaders. Had a valve job somewhere around 2500 hours. The same yard has been maintaining the boat since 1990. They have been using Rotella 15w40 for a long time and when it gets warm in August the previous owner would pump out a quart and replace with Lucas Oil. I did the same thing in my last boat with the same motors. With that track record, I'm sticking with it.
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